Improvement in padlocks



:To all whom it may concern todo fitug (haben i (effin.

WLLLIAMneINrYIREror NEW YORK. N; Y.

`Letters Patent No. 109,922, dated Decemter 6, 1870.

IMPRCVEMENT' IN PADLOCKS.

The schedule referred to in these Letters Patent and making para or the same.

Figure 1 represents 'a front view of' my invention.

when the mechanism is in a locking position.

Figure 1s a sinnlar view of the same' when unlocked.

bler and bolt.

Similar letters indicate corresponding parts.

rJjhis invention consists in the arrangement ofa rocking tumbler-bolt, in combination with a reciprocating bolt, both bolts catching in the shackle of'a lock from opposite sides, said rocking-bolt being provided with a stop, which prevents the reciprocating bolt from moving back until it is raised by the proper key, and the reciprocating bolt-beine' provided with two shoulY ders, one below and the ot 1er above a recess, capable of receiving the stop of 'the rocking-bolt in such a manner that the shackle is firmly retained in'its lock*` ing position by the'rocking tumbler-bolt, and also by the reciprocating bolt, and that when an attempt is made to open the lock with a key the bit'of which is not exactly of the correct height, the stop of'the tumbler bea-rs either against't-he upper or against the lower shoulder of the bolt, and the bolt cannot be moved back.

In the drawingv The letter A designates the case of a' lock,said case forming the bearings for the locking mechanism.

This mechanism consists, principally, of a rocking tumbler-bolt, B, and a reciprocating holt, G;

The tumbler-bolt 'is made in-the form of a bellcrank having its fulcrum on the pivot a, and it is providedat one end with a nosc, b, which catches in the slot or'recess of th'e'shackle D from one side, while the bolt B catches thereiniiozn the opposite side, as shown in iig. l of the drawing.

The tnmbler-bolt is also provided with a stop, c,

best seen in iig. 3, which, when thc mechanism isin its locking position, bears against the shoulder rl on the reciprocating bolt O. p

This shoulder is situated below a recess, e, and an- Fgnre 3 is a detached inverted plan ofthe tumother shoulder, j, is situated above said recess, so that, in onder to allow the bolt being thrown back, the stop c of the tumbler vmust be raised just high?, enough to clear both shoulders and to pass into the recess.

1t' thcstop o' is lifted a little too high, it,bcars` against-the upper shoulder f, and the boltcannot be thrown back; and if the stop c is not lifted high enough, it bears against the lower shoulder and prevents tfhe bolt being thrown back. s

The tumbler-bolt is subjected to the action of a spring, g, which has a tendency to keep said tumblerbolt in its locking position, and one end of which serves to throw out the shackle Kas soon the saine is released by the bolts.

The reciprocating bolt is subjected to the action of a spring, h, and the recess e is inclined, so that by its -action on the stop o the tun'ibler-bolt is retained in its unlocking position (see tig. 2) even after the key ceases to act directly on said tumbler-bolt. y

When the proper key is inserted into the lock and turned in the right direction, it first lilts the tumblerbolt, so as to throw the nose b out ot the slot of the shackle D, and, at the same time, the stop c is raised and brought opposite the recess e in the bolt O. 'll-hen the key begins to act on the inclined face i oi' the bolt G, and thereby said bolt is thrown back, `while the tumbler-bolt is retained in its unlocking position by the action of' the inclined recess c on the stop c.

As soon as the key releases the bolt C, the entire mechanism is returned to its locking position by the action ofthe springs f/ h.

Both the tumbler-bolt and the reciprocating bolt are rounded olf at their heads, so that the shacklecau be depressed and locked without using the key.

By these means a lock is obtained which is very simple in its construction, and which cannot be easily picked.

"What I claim as new, and desire to secure by Letters Patent, is-

The tumblerbolt 13,' with its rounded nose b and stop o, in combination with the shackle' D, and with vthe reciprocating bolt C, with its inclined recess eand shoulders Zand f above and below said recess, snbstantially as herein shown. a

WILLIALWI MCINTYIRE.

iVitnesses MARTHA MGINTYIRF., W. HAUFF. 

